Octopus Energy was only set up in 2015 but has shaken up the energy market. Its website boasts of being the UK's "most awarded energy supplier" and promises cheap, renewable energy for households.

In darts, Luke Littler became one of the wealthiest teenagers in the UK when he lifted his first World Championship title in January. The then 17-year-old pocketed £500,000 for his win against ...